Just like the old times, Choi Woong (Choi Woo Sik) and Kook Yeon Soo (Kim Da Mi) bask in each other's warmth and affection. It's like nothing changed between them, despite being broken up for so many years. However, this fact worries the latter, taking drastic measures to spice up the relationship.

'Our Beloved Summer' Episode 13: Kook Yeon Soo Takes Drastic Measures to Spice Up Her Relationship With Choi Woong

Over the course of their relationship, high school sweethearts Yeon Soo and Woong never did anything but fight, quarrel and make up. Now that they're reconciled, she notices that nothing ever really changed between them, which worries her a lot.

According to the research she read, couples who often fight, break up and get together again have a high tendency to fall apart in the long run. Because of this, Yeon Soo tries to spice things up with help from her colleague.

Yeon Soo attempts to take their relationship to a different level by changing her appearance, how she dresses and acts around her lover. To her disappointment, Woong is just weirded out by the sudden change.

Woong then assures his girlfriend that she doesn't need to change as he loves her just the way she is. He tells Yeon Soo that he loves how she appreciates the smallest things, how she nags and everything about Yeon Soo.

Rules Get Broken Sometimes When it Comes to Love

Eun Ho and Sol Yi, Yeon Soo and Woong's friends, became much closer with each other after their frequent meetings together with their chaotic friends.

Because of this, the two have grown mutual liking for one another even when they deny it themselves.

Sol Yi keeps on telling Eun Ho that she never dates younger men, which offends Eun Ho who meekly "rejects" the beautiful woman, even when he obviously likes her.

When Sol Yi goes out for a blind date, a jealous Eun Ho sulks in the corner, but still helps Sol Yi with whatever she needs to improve her restaurant.

IN CASE YOU MISSED IT: Here's Why Kim Da Mi and Choi Woo Sik's 'Our Beloved Summer' is Highly Loved

On the other hand, trapped in an unrequited love, Kim Ji Woong (Kim Sung Cheol) and NJ (Noh Jung Ui) help themselves to forget the memories and feelings they have for Yeon Soo and Woong, respectively.

The two once said that when they like something, they never give up. However, in the name of love, the two tweak their rules a little bit in order to move forward.

NJ decides to stop seeing Woong for a moment, considering Yeon Soo's feelings. Ji Woong, who chooses himself this time, takes some time off to heal himself.

Choi Woong Drops the Bomb

Yeon Soo decides to spend the night at Woong's house, drinking some tea and reading a book. She gets surprised after seeing a pamphlet of a university used as a bookmark. Yeon Soo asks Woong if he plans to go to the architecture school, and discovers that her boyfriend never graduated.

Woong lays down his walls and bares his soul, pouring his honest heart to Yeon Soo. When the conversation became deeper, he musters up his courage to asks Yeon Soo why she decided to break up with him before.

READ MORE: 'Our Beloved Summer' Episode 12: Love Fills the Air as Kim Da Mi and Choi Woo Sik Get Back Together

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Written by Elijah Mully.